Mr. Giant has kidnapped the brilliant Dr. Van Kohler and is planning to use the Doctor's invention, the N-bomb, to hold the world hostage. The only one who can foil Mr. Giant's evil scheme is Agent 00, a 3-foot-tall filipino martial arts master, expert marksman, top-class romancer and all-around superspy. Can Agent 00 rescue Dr. Kohler before it's too late?

At 2'9", Weng Weng is considered to be the shortest man to ever take the lead in a martial arts or action movie.

Agent OO's gadgets included an anti-poison ring; a remote-control flying bowler-hat that spoofs Oddjob's in Goldfinger (1964), a small-scale quick-assembly machine gun and a miniature jet-pack that spoofs James Bond's from You Only Live Twice (1967).

The film spurred one sequel The Impossible Kid of Kung Fu (1982) released in the next year which promised a third installment "License Expired" in its closing credits but this third movie was never made.